The Microsoft application agent uses block-based backup technology to back up Exchange Server databases in stand-alone and DAG environments. Block-based backup (BBB) technology tracks changed blocks of the Exchange database and log files as follows:
Block-based backups have reduced backup times because the backup process respectively backs up only the occupied disk blocks and changed disk blocks of the Exchange database and log files. During the backup, the application agent scans a volume or a disk where Exchange databases reside and backs up only changed blocks that are related to Exchange database.
Block-based backups provide instant access to the backups. These backups enable you to access databases using ItemPoint and perform granular restores.
Block-based backups use the following technologies: